Supporting disk for a shaft of a rotor in an open-end spinning machine

Abstract

A supporting disk for a rotor of an open-end spinning machine comprising a hub ring made of metallic material and a support ring made of polymer material affixed to the outer circumferential surface of the hub ring, the outer circumferential surface of the hub ring engaging the inner circumferential surface of the support ring. The support ring extends beyond the hub ring in the axial direction on both sides with an equal projecting length.

What is claimed is: 
     
       1. A supporting disk for a shaft of a rotor of an open-end spinning machine comprising a hub ring comprised of a metallic material and a support ring comprised of a polymer material; wherein an inner circumferential surface of the support ring engages an outer circumferential surface of the hub ring;   wherein the support ring extends beyond the hub ring in a direction parallel to an axis of rotation on both sides with substantially equal projecting lengths on each side; and   wherein at least one of the projecting lengths has cooling ribs extending substantially in the radial direction and wherein the cooling ribs have a maximum depth which substantially corresponds to the projecting length.   
     
     
       2. A supporting disk according to claim 1, wherein the ratio of the sum of both axial projecting lengths to the axial width of the outer circumferential surface of the hub ring is 0.01 to 0.5. 
     
     
       3. A supporting disk according to claim 1, wherein the support ring has an essentially U-shaped profile open radially to the inside which completely surrounds the outer circumferential surface of the hub ring in a clamp-like manner. 
     
     
       4. A supporting disk according to claim 1, wherein the hub ring has end faces on both sides in the axial direction having self-contained annular grooves running in the circumferential direction, wherein the annular grooves are constructed to engage congruently shaped projections of the support ring. 
     
     
       5. A supporting disk according to claim 1, further comprising at least one signal transmitter joined to an end face of the hub ring, wherein the signal transmitter comprises a foil joined adhesively to the hub ring for reflecting light. 
     
     
       6. A supporting disk according to claim 5, wherein the foil is flush with a surface of the end face of the hub ring.